Add missing includes.

Change-Id: Ic7199045d0cffb208871f52cc167194013351d32
diff --git a/native/jni/jni_common.cpp b/native/jni/jni_common.cpp
index 85d2683..b9e2c32 100644
--- a/native/jni/jni_common.cpp
+++ b/native/jni/jni_common.cpp
@@ -19,6 +19,7 @@
 
 #include "com_android_inputmethod_keyboard_ProximityInfo.h"
 #include "com_android_inputmethod_latin_BinaryDictionary.h"
+#include "defines.h"
 #include "jni.h"
 #include "proximity_info.h"